OPTO-F+E 3.0

The OPTO-F+E 3.0 device is a combined short-circuit and earth fault indicator. Due to its measuring principle, the earth fault indication is suitable for networks with low-impedance or solidly earthed neutral as well as for operation in radial or open ring networks. In the event of a short-circuit, the current transformers mounted on the conductors emit light signals via fibre optic cables to the evaluation unit in the housing where they are indicated as a short-circuit by phase-selectively operated red flashing LEDs.